CN106725286B - Medical eyeball tractive force clinical trial device and its application method - Google Patents

Abstract

The present invention relates to a clinical test device for medical eyeball traction force and its use method, which is characterized in that the device comprises a display handle, an operating head and a chuck, the lower part of the display handle is connected to the upper part of the operating head through threads, and the upper part of the chuck is connected to the lower part of the operating head; The operation head includes an adjustment knob, a positioning screw and a casing; the casing is a hollow conical structure, and an adjustment through hole is opened on the casing, and the upper part of the casing is screwed to the lower part of the display handle; the adjustment knob is installed at the position of the adjustment through hole , the adjustment knob and the positioning screw are fixed inside the shell; the drive shaft wheel, the left driven shaft wheel, the right driven shaft wheel and the transmission shaft wheel are installed in the adjustment knob; The holes corresponding to the driven shaft wheel, the right driven shaft wheel and the drive shaft wheel; the drive shaft wheel is located at the center of the drive shaft wheel, concentric with the drive shaft wheel; with the drive shaft wheel as the center, the left and right slave wheels are symmetrically arranged Drive shaft wheel and right driven shaft wheel.

Description

Medical eyeball traction force clinical testing device and using method thereof

technical field

The present invention relates to a clinical test device for medical eyeball traction force and its application method. The device can measure the pull force of the extraocular muscles of the examinee through a pull test, and can be used to evaluate whether the examinee suffers from extraocular muscle paralysis. The correction of strabismus provides relevant data support.

Background technique

The pull test is an important test for measuring the strength of the extraocular muscles, and it can also be used to evaluate whether the person being tested has extraocular muscle paralysis. There are two kinds of pull tests, namely active pull test and passive pull test. Active pull test uses tweezers to clamp the corneoscleral limbal tissue, and makes the examinee turn the eyeball in a certain direction. The tension of the extraocular muscles is evaluated by the contraction force of the extraocular muscles; the passive stretch test is to use tweezers to clamp the corneoscleral limbal tissue, and then make the examinee try not to actively turn the eyeball (or general anesthesia), and the examiner uses tweezers to pull The eyeball moves in a certain direction, and the influence of limiting factors is assessed by sensing the resistance during movement. Usually, the active contraction force of normal people is about 1000mN, and the passive stretching force ranges from 600mN to 1000mN. If the active contraction force is less than 150mN, extraocular muscle paralysis is suspected.

The traction test is an important and commonly used examination method in clinical practice. At present, ordinary ophthalmic medical tweezers are used (see Figure 1). The traction test with this kind of medical tweezers has the disadvantages of being unable to quantify and relying too much on the examiner's feeling and experience. The accuracy of the inspection results is greatly reduced.

Contents of the invention

Aiming at the problems faced by current clinical testing, the technical problem to be solved by the present invention is to provide a medical eyeball traction force clinical testing device and its usage method. The device is based on traditional ophthalmic medical tweezers, small in size, easy to carry, simple in overall structure, and easy to operate. During operation, the shaft wheel is used as the driving and clamping structure, and the chuck can be opened and closed according to the test conditions, and the holding is stable. , the measurement result is displayed in the form of a digital display, which is easy to read and has high reliability. It can measure the accurate value of the extraocular muscle tension of the tested person; this device can be applied to the detection of the extraocular muscle tension, and is used Provide data to support whether patients suffer from extraocular muscle paralysis and correction of strabismus.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a clinical test device for medical eyeball traction force, which is characterized in that the device includes a display handle, an operating head and a chuck, and the lower part of the display handle and the upper part of the operating head are connected by threads, and the clamp The upper part of the head is connected with the lower part of the operating head;

The operating head includes an adjustment knob, a positioning screw and a housing; the housing is a hollow conical structure, and an adjustment through hole is opened on the housing, and the upper part of the housing is screwed to the lower part of the display handle; the adjustment is installed at the position of the adjustment through hole. The knob, the adjusting knob and the positioning screw are all fixed inside the shell; the driving shaft wheel, the left driven shaft wheel, the right driven shaft wheel and the transmission shaft wheel are installed in the adjusting knob; The holes corresponding to the left driven shaft wheel, the right driven shaft wheel and the drive shaft wheel; the drive shaft wheel is located at the center of the drive shaft wheel, concentric with the drive shaft wheel; with the drive shaft wheel as the center, the left and right symmetrical arrangements The centers of the driven shaft wheel and the right driven shaft wheel, the left driven shaft wheel, the right driven shaft wheel and the transmission shaft wheel are on the same straight line; the driving shaft wheel meshes with the left driven shaft wheel and the right driven shaft wheel , the left driven shaft wheel and the right driven shaft wheel mesh with the transmission shaft wheel at the same time;

The left driven shaft wheel includes an inner ring, an outer ring, balls and a fixing frame; teeth are arranged on the outer side of the outer ring, the inner side of the outer ring is connected with the inner ring through balls, and the balls are fixed between the inner ring and the outer ring through the fixing frame. between; the center of the inner ring is provided with an inclined through hole, and the angle between the inclined through hole and the central axis of the transmission shaft wheel is 3-10°; the structure of the right driven shaft wheel and the left driven shaft wheel is the same ;

The positioning screw is a hollow screw with a fixed groove on the top. The lower part of the positioning screw is inserted into the center hole of the transmission shaft wheel. The positioning screw and the transmission shaft wheel are connected by threads, and are coaxial with the transmission shaft wheel. It is fixed in the shell of the operating head through the fixing groove at the top;

The chuck includes left and right parts with the same shape and structure, the upper part of each part is cylindrical, inserted into the inclined through hole of the left driven shaft wheel or the right driven shaft wheel, and the lower part is a flat chuck tip , the upper and lower parts and the shell of the operating head are fixedly connected through the corresponding positioning holes through the positioning nails; stress strain gauges are pasted at the corners of the chuck tip;

The display handle is provided with a display screen, a switch and a reset key, and a resistance full bridge circuit, an amplifier, an A/D converter, a single-chip microcomputer and a power module are arranged inside the display handle; The key and the switch are connected, the resistance full-bridge circuit is connected with the stress strain gauge, and then connected with the input end of the single-chip microcomputer through the amplifier and the A/D converter; the power supply module supplies power for the whole device.

The above-mentioned method for using the medical eyeball traction force clinical testing device, the steps of the method are as follows:

1) Disinfect the chuck of the device with medical alcohol;

2) Turn on the switch of the device, and after the display shows a stable value, press the reset button;

3) Clamp the corneoscleral limbal tissue of the tested subject with the chuck, and clamp the corneoscleral limbal tissue by rotating the adjustment knob, so as to ensure that the corneoscleral limbal tissue will not fall off from the chuck during traction;

4) After ensuring the clamping and the display is stable, press the reset button;

5) The moving device or the eyeball of the subject must ensure that the moving direction is perpendicular to the surface of the stress strain gauge during the movement, so as to ensure that the deformation of the stress strain gauge is the deformation caused by positive pressure;

6) After the display is stable, read the size of the display and make a record;

7) Rotate the adjustment knob to open the chuck;

8) Repeat step 1), step 3), step 4), step 5), step 6), step 7) 3 to 4 times in sequence, and the average reading obtained after repeated measurements is the muscle traction force of the tester .

Compared with prior art, the beneficial effect of the present invention is:

1. The device of the present invention is based on the existing clinical ophthalmic medical tweezers, which is small and light, can better cater to clinical applications, and is easy to promote; the opening of the chuck is controlled by the driving shaft wheel, the driven shaft wheel and the transmission shaft wheel And closed, avoiding the problem of unstable reading caused by unstable force when pinched by hand, it is easier to obtain more accurate traction value; in the driven shaft wheel (left driven shaft wheel and right driven shaft wheel) The inclined through hole is inclined and used to fix the upper part of the chuck, and the opening and closing of the chuck is controlled by moving the driven shaft wheel up and down, which overcomes the disadvantage of single clamping force when using a fixed buckle, and is more Convenient and precise.

2. take the single-chip microcomputer as the control center in the display handle of the device of the present invention, and the single-chip microcomputer is a rewritable microcomputer, except that the digital voltage can be converted into power and displayed on the display screen, and can also be used on the pins of the single-chip microcomputer. Fix the corresponding wireless connection module, and transmit the measured data to the terminal device through the wireless connection module, which is convenient for post-processing, and provides analytical data support for the evaluation of external ophthalmoplegia and the treatment of strabismus.

3. The device of the present invention uses stress strain gauges to detect the deformation of the collet, and the deformation of the collet causes the deformation of the stress strain gauge, so that the resistance of the stress strain gauge changes, and the magnitude of the change in resistance value can be detected by the resistance full bridge circuit , and can convert the resistance change into an analog voltage change. After the analog voltage is amplified by the amplifier, it is sent to the A/D converter. The A/D converter can convert the analog voltage into a digital voltage. The converted digital voltage can be detected by the microcontroller. can be detected, and the detected digital voltage can be converted into force, so as to indirectly, accurately and quantitatively detect the magnitude of the extraocular muscle traction.

4. The use method of the present invention can directly obtain the specific numerical value of the traction force, which is accurate, quantitative and high in precision, and can provide accurate data support for clinical practice.

Description of drawings

Fig. 1 is present clinical medical ophthalmic tweezers;

Fig. 2 is a schematic structural view of an embodiment of the medical eyeball traction force clinical test device of the present invention;

Fig. 3 is the partially enlarged structure schematic diagram of I among Fig. 2;

Fig. 4 is a schematic diagram of the internal structure of the operating head in an embodiment of the medical eyeball traction force clinical testing device of the present invention;

Fig. 5 is a three-dimensional structural schematic diagram of the adjustment knob 2-1 of an embodiment of the medical eyeball traction force clinical testing device of the present invention;

Fig. 6 is an internal structure diagram of the adjustment knob of an embodiment of the medical eye traction force clinical test device of the present invention;

Fig. 7 is a half-section schematic diagram of the left driven shaft wheel 2-1-2 of an embodiment of the medical eyeball traction force clinical testing device of the present invention;

Fig. 8 is a connection block diagram of the internal structure of the display handle 1 of an embodiment of the clinical test device for medical eyeball traction force of the present invention;

In the figure 1. Display handle, 1-1. Display screen, 1-2. Switch, 1-3. Reset key, 1-4. USB power interface, 1-5. Resistive full bridge circuit, 1-6. Amplifier , 1-7.A/D converter, 1-8.MCU, 1-9.Bluetooth module; 2.Operation head, 2-1.Adjusting knob, 2-1-1 drive shaft wheel, 2-1-2 .Left driven shaft wheel, 2-1-2-1. Inner ring, 2-1-2-2. Outer ring, 2-1-2-3. Ball, 2-1-2-4. Fixing frame, 2-1-3. Drive shaft wheel, 2-1-4. Right driven shaft wheel, 2-2. Positioning screw, 2-2-1. Fixing groove, 2-3. Shell; 3. Chuck, 3-1. Stress gauge, 3-2 positioning hole, 3-3, positioning nail; terminal equipment 4.

Detailed ways

The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but this should not be used as a limitation to the protection scope of the claims of the present application.

The clinical test device for medical eyeball traction force of the present invention (hereinafter referred to as the device, see Fig. 2-Fig. 8) comprises a display handle 1, an operating head 2 and a chuck 3, the lower part of the display handle 1 and the upper part of the operating head 2 are connected by threads, and the upper part of the chuck 3 Connect with the lower part of the operation head 2;

The operating head 2 (see Fig. 2 and Fig. 4 ) includes an adjustment knob 2-1, a positioning screw 2-2 and a housing 2-3; The through hole, the upper part of the shell is threadedly connected with the lower part of the display handle 1; the adjustment knob 2-1 is installed at the position of the adjustment through hole, and the adjustment knob 2-1 is used to adjust the opening and closing of the collet. By rotating the adjustment, the adjustment knob 2- 1 When moving upward, the collet is closed, and when moving downward, the collet is opened, and both the adjusting knob 2-1 and the positioning screw 2-2 are fixed inside the shell 2-3; the adjusting knob 2-1 (see Figure 6 ) is equipped with driving shaft wheel 2-1-1, left driven shaft wheel 2-1-2, right driven shaft wheel 2-1-4 and transmission shaft wheel 2-1-3; the adjustment knob 2-1 There are holes corresponding to the left driven shaft wheel 2-1-2, the right driven shaft wheel 2-1-4 and the transmission shaft wheel 2-1-3 on the end face (see Fig. 5); 2-1-3 is located at the center of the driving shaft wheel 2-1-1, concentric with the driving shaft wheel 2-1-1; with the drive shaft wheel 2-1-3 as the center, the left driven shaft wheel 2 is symmetrically arranged left and right -1-2 and right driven shaft wheel 2-1-4, the center of circle of left driven shaft wheel 2-1-2, right driven shaft wheel 2-1-4 and drive shaft wheel 2-1-3 is located at the same On a straight line; driving shaft wheel 2-1-1 meshes with left driven shaft wheel 2-1-2 and right driven shaft wheel 2-1-4, left driven shaft wheel 2-1-2 and right driven The shaft wheel 2-1-4 is meshed with the transmission shaft wheel 2-1-3 at the same time;

The left driven shaft wheel 2-1-2 (see Fig. 7) includes an inner ring 2-1-2-1, an outer ring 2-1-2-2, a ball 2-1-2-3 and a fixed frame 2 -1-2-4; the outside of the outer ring 2-1-2-2 is provided with teeth, the inner side of the outer ring 2-1-2-2 and the inner ring 2-1-2-1 through the ball 2-1-2 -3 connection, the ball 2-1-2-3 is fixed between the inner ring and the outer ring through the fixing frame 2-1-2-4; the center of the inner ring 2-1-2-1 is provided with an inclined through hole , the angle between the inclined through hole and the central axis of the transmission shaft wheel 2-1-3 is 3-10°, and the left driven shaft wheel 2-1-2 rotates under the action of the driving shaft wheel 2-1-1 , during the rotation of the adjustment knob 2-1, the inner ring 2-1-2-1 remains stationary in the radial direction, and only moves axially along the chuck 3; the right driven shaft wheel 2-1-4 The same structure as the left driven shaft wheel 2-1-2, the difference is that when the right driven shaft wheel 2-1-4 and the left driven shaft wheel 2-1-2 are installed, the right driven shaft wheel The inclination angle of the inclined through hole in the inner ring of 2-1-4 is opposite to that of the inclined through hole in the inner ring of the left driven shaft wheel 2-1-2, and is in line with the central axis of the drive shaft wheel 2-1-3. The included angle is 3-10°;

The positioning screw 2-2 (see Fig. 4) is a hollow screw with a fixed groove 2-2-1 on the top, and the bottom of the positioning screw 2-2 is inserted into the central hole of the transmission shaft wheel 2-1-3, The positioning screw 2-2 is threadedly connected with the transmission shaft wheel, and is coaxial with the transmission shaft wheel, and is fixed in the casing 2-3 of the operating head through the fixing groove at the top;

The fixing groove 2-2-1 at the top of the positioning screw 2-2 is used to fix the entire positioning screw 2-2, preventing the positioning screw 2-2 from rotating together with the positioning screw 2-2 during the rotation of the adjustment knob 2-1, and simultaneously positioning The screw rod 2-2 also provides a corresponding track for the up and down movement of the adjustment knob; the positioning screw rod 2-2 is a hollow structure, through which the connecting data line passes, and also protects the data line;

The chuck 3 (refer to Fig. 3 and Fig. 4 ) includes two left and right parts with the same shape and structure, the upper part of each part is cylindrical, inserted into the left driven shaft wheel 2-1-2 or the right driven shaft wheel 2 -In the inclined through hole of 1-4, the lower part is a flat chuck tip, and the structure shape of the lower part is the same as that of the conventional medical tweezers tip, which is convenient for clamping the corneoscleral limbal tissue. The upper and lower parts and the shell of the operating head 2 are three Or through the positioning nail 3-3 through the corresponding positioning hole 3-2 for fixed connection, the positioning hole 3-2 is mainly used for the axial positioning of the chuck 3, through the positioning nail 3-3 to connect the chuck 3 and the operation The head 2 is connected, and at the same time, it is ensured that the chuck 3 will not move up and down along the axial direction of the device during the process of opening and closing; a stress strain gauge 3-1 is attached to the corner of the tip of the chuck, and the stress strain gauge 3-1 is mainly used to collect data. When the chuck 3 is deformed under the action of external force, the stress strain gauge 3-1 will detect it and transmit the detected data in the form of resistance;

The driving shaft wheel 2-1-1 is the main body of the whole adjustment knob 2-1. When an external force acts on the driving shaft wheel 2-1-1, the driving shaft wheel 2-1-1 drives the left driven shaft wheel 2-1. 1-2 and the right driven shaft wheel 2-1-4 rotate, through the action of the transmission shaft wheel 2-1-3, to ensure that the left driven shaft wheel 2-1-2 and the right driven shaft wheel 2-1- 4 Normal rotation; the transmission shaft wheel 2-1-3 and the positioning screw 2-2 are connected by threads, and during the rotation of the transmission shaft wheel 2-1-3, the transmission shaft wheel 2-1-3 will move along the positioning wire The thread of the rod 2-2 moves up and down, and thereby drives the entire adjustment knob 2-1 to move up and down, indirectly controlling the opening and closing of the chuck 3;

Described display handle 1 (referring to Fig. 2 and Fig. 8) is provided with display screen 1-1, switch 1-2 and reset key 1-3, is provided with resistance full bridge circuit 1-5, amplifier 1 inside display handle -6, A/D converter 1-7, single-chip microcomputer 1-8 and power supply module (not drawn among the figure); -3 connection, the resistance full bridge circuit 1-5 is connected with the stress strain gauge 3-1, and the resistance full bridge circuit 1-5 passes through the input terminal of the amplifier 1-6, the A/D converter 1-7 and the single chip microcomputer 1-8 connection; the power module is a rechargeable battery that powers the entire unit.

A further feature of the present invention is that the angle between the inclined through hole on the inner ring and the central axis of the transmission shaft wheel 2-1-3 is 5°, which is convenient for clamping the limbal tissue of the corneosclera, and the volume of the chuck is relatively small. Small and easy to use.

A further feature of the present invention is that a piece of stress strain gauge is attached to the inside and outside sides of the corner of the chuck tip in each part of the chuck 3, and there are four stress strain gauges in the chuck 3, and the four stress strain gauges can be Stress supplementation can further improve the accuracy. The stress strain gauge, the resistance full bridge circuit, the amplifier, the A/D converter and the single chip microcomputer are connected through the corresponding data lines, and the data lines are routed from the hollow structure of the positioning screw 2-2. , The overall appearance is beautiful, and it has a protective effect on the line.

A further feature of the present invention is that the display handle 1 is also provided with a wireless connection module, the input end of the wireless connection module is connected with the output end of the single-chip microcomputer, and the output end of the wireless connection module is connected with the terminal equipment. The terminal device here can be a computer, a smart phone, etc., and is used to store the measured test results, so as to facilitate the filing of the patient's condition; the wireless connection module can be connected by means of bluetooth, infrared, wifi, etc. The single-chip microcomputer is a rewritable microcomputer, which is more convenient for subsequent development and processing. The display screen 1-1 is used to display the final test result; when the chuck 3 is deformed under the action of force, the stress strain gauge 3-1 will detect, and the stress strain gauge 3-1 will detect the deformation and also Deformation occurs, the resistance value of the deformed stress strain gauge 3-1 will change, and the changed resistance value will be transmitted to the resistance full bridge circuit 1-5 through the data line, and the resistance full bridge circuit 1-5 will detect the resistance Change and convert it into an analog voltage change, and then transmit the analog voltage to the amplifier 1-6, after the analog voltage is amplified by the amplifier 1-6, then transmit it to the A/D converter 1-7, and the A/D converter 1- 7 After receiving the amplified analog voltage, convert it into a digital voltage and send it to the single-chip microcomputer 1-8, the digital voltage is converted into the magnitude of the force under the program of the single-chip microcomputer 1-8, and then displayed on the display screen 1-1 display, and at the same time transmit the data to the terminal device through the bluetooth module 1-9; the display handle 1 is also provided with a USB power interface 1-4 to charge the entire device.

The steps of the using method (abbreviation method) of the medical eyeball traction force clinical test device of the present invention are as follows:

1) Disinfect the chuck of the device with medical alcohol;

2) Turn on the switch of the device. After the display shows a stable reading, press the reset button. After opening, press the reset button to prevent data deviation, because the stress strain gauge is very sensitive, and the data will change when the chuck is slightly deformed. ;

3) Clamp the corneoscleral limbal tissue of the tested subject with the chuck, and clamp the corneoscleral limbal tissue by rotating the adjustment knob, so as to ensure that the corneoscleral limbal tissue will not fall off from the chuck during traction;

4) After the clamping is ensured and the display is stable, press the reset button; the purpose of pressing the reset button here is to eliminate the influence of deformation during the clamping process;

5) The moving device or the eyeball of the subject must ensure that the moving direction is perpendicular to the surface of the stress strain gauge during the movement, so as to ensure that the deformation of the stress strain gauge is the deformation caused by positive pressure;

6) After the display is stable, read the size of the display and make a record;

7) Rotate the adjustment knob to open the chuck;

8) Repeat step 1), step 3), step 4), step 5), step 6), step 7) 3 to 4 times in sequence, and the average reading obtained after repeated measurements is the muscle traction force of the tester ; Repeated measurement here is to reduce the measurement error caused by external factors, for example, muscles will contract unconsciously when people are tense.

The device of the present invention is mainly designed for the inability to accurately measure the pulling force of the extraocular muscles in clinical practice at present. The device is suitable for both active pulling tests and passive pulling tests. It is determined jointly by the doctor and the subject, and the device is mainly used to measure the magnitude of muscle traction, which has nothing to do with the state of the subject, and the test accuracy is high. When performing the active pulling test, the subject’s eyeball needs to be moved in step 5), and when performing the passive pulling test, the device needs to be moved in step 5), and the moving direction must always be vertical during the moving process on the surface of the stress gauge. When the average reading is less than 150mN, it can be judged that the subject is suffering from muscle paralysis. When it is necessary to perform strabismus correction, the muscle traction force on the left and right sides of the testee's eyes can be measured respectively according to the above method, and then relevant data can be provided to the doctor for strabismus correction.

The components involved in the present invention can be obtained commercially.

What is not mentioned in the present invention is applicable to the prior art.

Claims (5)

1. A kind of 1. medical eyeball tractive force clinical trial device, it is characterised in that the device includes display handle, operating head and chuck, Display handle bottom is connected through a screw thread with operating head top, and chuck top is connected with operating head bottom；

   The operating head includes adjusting knob, positioning screw rod and shell；The shell is conical hollow structure, is provided with shell Through hole is adjusted, shell upper is connected with display handle lower thread；In the opening position installation and adjustment knob of regulation through hole, adjusting knob The inside of shell is each attached to positioning leading screw；Driving shaft wheel, left driven shaft wheel, right driven shaft are installed in the adjusting knob Wheel and power transmission shaft wheel；The hole corresponding with left driven shaft wheel, right driven shaft wheel and power transmission shaft wheel is provided with the end face of adjusting knob； The power transmission shaft wheel is located at the centre of driving shaft wheel, concentric with driving shaft wheel；Centered on power transmission shaft wheel, symmetrical cloth Left driven shaft wheel and right driven shaft wheel are put, the center of circle of left driven shaft wheel, right driven shaft wheel and power transmission shaft wheel is located along the same line； Driving shaft wheel is meshed with left driven shaft wheel and right driven shaft wheel, left driven shaft wheel and right driven shaft wheel again simultaneously with power transmission shaft wheel It is meshed；

   The left driven shaft wheel includes inner ring, outer ring, ball and fixed mount；Be provided with tooth on the outside of outer ring, the inner side of outer ring with it is interior Circle is connected by ball, and ball is fixed between inner ring and outer ring by fixed mount；The center of the inner ring is provided with inclined via-hole, The angle of the inclined via-hole and the central axis of power transmission shaft wheel is 3-10 °；The structure of the right driven shaft wheel and left driven shaft wheel It is identical；

   The positioning screw rod is hollow screw, and top is provided with fixing groove, the centre bore of the bottom insertion power transmission shaft wheel of positioning screw rod In, positioning screw rod is connected through a screw thread with power transmission shaft wheel, and coaxial with the guarantee of power transmission shaft wheel, and is fixed by the fixing groove on top In in the shell of operating head；

   The chuck includes shape and structure identical or so two parts, and the top of each part is cylindric, is inserted into left driven In the inclined via-hole of axle wheel or right driven shaft wheel, bottom is the shell of the chuck tip of flat, upper and lower part and operating head Three is fixedly connected by locating pin through corresponding positioning hole；Ess-strain piece posts in corner in chuck tip；

   The display handle is provided with display screen, switch and reset key, and resistance full-bridge circuit, amplification are internally provided with display handle Device, A/D converter, single-chip microcomputer and power module；The single-chip microcomputer connects with display screen, reset key, switch respectively, resistance full-bridge Circuit is connected with ess-strain piece, then is connected by the input of amplifier, A/D converter and single-chip microcomputer；Power module is whole Individual device power supply；Ess-strain piece, resistance full-bridge circuit, amplifier, A/D converter and single-chip microcomputer are connected by corresponding data wire Connect, data wire cabling from the hollow structure of positioning screw rod.
2. 2. medical eyeball tractive force clinical trial device according to claim 1, it is characterised in that inclining on the inner ring The angle of oblique through hole and the central axis of power transmission shaft wheel is 5 °.
3. 3. medical eyeball tractive force clinical trial device according to claim 1, it is characterised in that each part of chuck In chuck tip corner inside and outside respectively post a piece of ess-strain piece.
4. 4. medical eyeball tractive force clinical trial device according to claim 1, it is characterised in that on the display handle also Provided with USB power connector, charged for whole device.
5. 5. medical eyeball tractive force clinical trial device according to claim 1, it is characterised in that in the display handle also Provided with wireless connection module, the input of wireless connection module and the output end of single-chip microcomputer connect, the output of wireless connection module End is connected with terminal device.